Method of producing hollow quartz bodies.



A VOELKER.

METHOD OF PRODUCING HOLLOW QUARTZ BODIES.

APPLIO ATIOE FILED $116.13, 1909.

Patented Aug. 18, 19M

AUGUST VGELKER,

OF BEUEL, 130N353, G-ELRMABTSZ METHOD 6F PRODUCING HOLLOW QUARTZ BOIJXES.

i ions-ass.

1 '0 all whom it may comer/2' le it known that I, AUGUST Vonnmzn, a citizen of the Empire of Germany, residing at Beuel, near Bonn-on-the-Rhine, in the Empire of Germany, have invented a new and useful Method of Producing Hollow electric furnace the raw quartz (arenaceous quartz, quartz-sand) can be turned into a semi-liquid hot state, but it can never be made to melt, but will at once volatilize the moment that the temperature is further increased beyond that point at which the quartz hasbecoine semi-liquid. I'lowever, in this state the mate 'ial can also be worked. The working of the semi-liquid hot quartz may be effected either within or without the furnace. For working the semi-liquid quartz without the furnace it has been proposed to introduce compressed air by means of S ecial tools into the tubular plastic body. However, the introduction of the special tools iron, carbon, or the like) is a most difficult operation which frequently results in failure, since the quartz in its semi-liquid state will rapidly congeal, more particularly the ends of such a body being worked will rapidly be chilled and harden. Also the working of the semi-liquid hot quartz within the furnace, say by the introduction of compressed air through a perforated tube etc., creates great difiieulties and frequently presents still greater defects than the first named method, since the tube is easily blocked up, becomes fragile, or will firmly adhere to the tough and stubborn material.

My invention relates to a method of forming diversified bodies from semi-liquid hot quartz with the aid of molds, while easily overcoming the said diflicultics, and the new method is very simple, safe and cheap; The new method is characterized by the applica tion to the tubular semi-liquid hot body to be worked of a foreign body capable of being wholly or partially gasified by the extreme heat of the quartz (about 2200 ceutigrade), so that the most rapidly developed gases Specification of Letters Patent. Application filed August 13, 1969.

1,4,. s. Paienteo Aug, Ito, Serial at. 512,693.

under high pressure can (prickly act blowin and pressing against the inside of a mold.

Owing to the natureoi quartz it is necessary to perform the Various i'iperations most quickly so as to prevent the quartz from pro inaturely 'congealing, and this further feature. of the new method, The said tore '11 body adapted to be wholly or partially gs lied by the extreme heat 0;: the quartz to worked, can be of almost .scription. For example it may be co ,Ipper, envelop, box, etc., of a more or was combustible material, such paper, paste -board, leather, etc, also of tinfoil, asbestos, etc, and lilleo. with a liquid or body to he evaporated or gasified, such as water, ice, hvdrocarbon, any of the oils, etc. Or the 1- reign body may be a salt falling to pieces in the heat, such as 'chlorid of, sodium, aunnoniun'ichlorid, etc. C r the liquid contained in the body may be bound in it, such is the r i with earth-fruits, for example ca "rots, tier-- nips, pdtatoes, and the like.

I- will no 1r ceed to describe my l tion with reference to the accompany drawings, in which- Figures '1 to 3 illustrate for example tl' :ee stages of the method of forming i quartz body.

Similar letters of reference refer to simi lar parts throughout the several Views.

The mold to be employed in the new method may be of any known construction, Whichwill have to depend upon. the size of the mass of senii-liquid quartz to he worked and upon the size of the bot into which the material is to be turned. :3 mold metal or the like and consisting, of the halves-a and 7) hinged together on the rirfic side is provided with projectionsc 7 and o, which may wholly or nearly come in contact with one another on the said mold. being closed The halves a and I) may each hare a cavity f (either circular or oral or of any other shape) and several air-holes r, y A tubular seini-liquid quartz body e 1; of suliicient length produced in an electric fllrnace by nit-inns of a resistance core FF; withdrawn from the furnace by means tongs, most rapidly freed on its e121,

from the loosely adherine' arenaceoas hertz, Y c (*1 J and quickly placed with its ends on the projections c of the lower mold half a, so that it floats above the cavity 7 (Fig. l) of the latter, while its ends project a little from the projections c. .A foreign body to be gasified, in this case a potato i is pushed into the middle of the central cavity m of the extremely hot body 6. by means of a stalk of straw it or a pointed rod of wood or the like, whereupon the upper mold half I) is at once turned downward and pressed strongly on the lower mold half a, so that the projections c and d will squeeze the ends (Fig. 3), the air' contained in the latter escaping to without through the holes r 1*.

It is of the highest importance to perform the various operations described above most ra'pidly'so as to prevent the quartz get-her for closing the mold.

from prematurely congealing and thus to avoid failures as much as possible. In this manner a closed hollow body 0 p is formed from the semi-liquid quartz in the mold a b, which body can be taken out of the mold, after the latter has been opened. l/Vhen so preferred, an annular protrusion n may be formed on the hollow body by suitably re cessing the mold, and may be taken oil in any known manner, for example by means of saws or other tools or a sandblasting apparatus, etc., when the body will be divided into two shells or plates 0 and 79 of quartz.

It is evident, that the mold may be varied in its construction in accordance with the finished article to be produced. It may be made in several pieces and the several pieces may be composed in any known manner. The mold halves a and 7) shown need not be hinged together; they may be secured in any known manner on partsgnided in some press and arranged to be nicely moved to- The projections rand (Z shown may be replaced by sharp edges similar to stamps and dies for cutting off the excess of the semi-liquid quartz. The mold may be so constructed as to form several independent hollow bodies at a time.

1 claim:

1. The herein described method of producing a hollow quartz body, which consists in withdrawing from a furnace a tubular semi-liquid quartz body, freeing its exterior from the loosely adhering arenaceous quartz, placing itwith its ends on the edge of a lower mold part, introducing into its cavity by means of a burnable tool a foreign body capable of being wholly or partially gasified by the extreme heat of the quartz, closing its cavity at both ends by squeezing the latter between the edges of the lower and of an upper mold part, and retaining the mold parts closed while the developed gases blow the quartz body and press it against the inside of the mold, the various operations being performed rapidly so as to prevent the quartz from prematurely congealing.

2. The herein, described method of producing a hollow quartz body, which consists in withdrawing from a furnace a tubular semi-liquid quartz body, freeing its exterior from the loosely adhering arenaeeous quartz, placing it with its ends on the edge of a lower mold part, introducing into its cavity by means of a burnable tool a foreign body capable of being wholly or partially gasified by the extreme heat of the quartz, closing its cavity at both ends by squeezing the latter and cutting off the ends of said tubular body between the edges of the lower and an upper mold part, and re taining the mold parts closed while the dei eloped gases blow the quartz body and press it against the inside of the mold, the various operations being performed rapidly so as to prevent the quartz from prematurely congealing.

'3. The herein described method of producing a hollow quartz body, which consists in withdrawing from a furnace a tubular semi-liquid quartz body, freeing it from the loosely adhering arenaceous quartz, placing it with its ends on the edge of a lower mold part, introducing into its cavity by means of a burnable tool a foreign body capable of being wholly or partially gasified by the extreme heat of the quartz, closing its cavity at both ends by squeezing the lat ter between the edges of the lower and an upper mold part, and retaining the mold parts closed while the developed gases blow -the quartz body and press it against the in side of the mold, the various operations described so far being performed rapidly so as to prevent the quartz from prematurely congealing, and removing from the cooled hollow body and protrusions formed between the twoedges of the mold.

4. The herein described method ofproducing a hollow quartz body, which consists in withdrawing from a furnace a tubular semiliquid quartz body, freeing its exterior from theloosely adhering quartz, placing it with its ends on the edge of a lower mold part, introducing into its cavity by means of a burnable'tool, a foreign body capable of be-- ing wholly or partially gasified by the extreme heat of the quartz, closing its cavity at both ends by squeezing the latter between the edges of the lower and an upper moldmwgsw paw, reminin @118 mold parts Biased While pamfis a line carresponding to flaw 111m uf the eievelepe gases blaw the: quartz bodiy division between the two part-s of the 0102M and press it against the inside of the mold, mold; I fiie various operations described so far ine- AUGUST VUEL & ing parformed rapidly so as to prevent the Witnesaes: uartz from prematurely cengealing, and NXKOLA'US Mm ividing the cooled-hzfliow body into two W, Km'zwmma. 

